Surprise? Huh. I didn't think they were small enough groups that overlap would be improbable...
Marque du Vin? Or no, sorry, "vin" is a French word already, isn't it? Let's see... 'twould almost certainly be granted before she met Kelsier, so no allomantic vials or beads of atium... something that wouldn't draw undue attention at the balls... maybe the earring? I'd like to do something with her Pushing, but I can't figure out anything that would both represent it and not attract attention.
Final Vin would, of course, have a different cutie mark. Possibly a shield.